Silvio Marzolini

After retiring as a player, Marzolini became manager of All Boys where he stayed from 1975 to 1976. In 1981 Marzolini returned to Boca Juniors, with which he won the 1981 Metropolitano with superstar Diego Maradona as the outstanding player of the team. Other notable players for Boca were Miguel Brindisi, goalkeeper Hugo Gatti and defender Oscar Ruggeri.

Marzolini's first steps as footballer were in Deportivo Italiano, soon moving to the young divisions of Ferro Carril Oeste in 1955. After a discussion with the club managers asking to play in the senior team, Marzolini was suspended for two years. Nevertheless, he debuted in Primera División in May 1959, playing against Boca Juniors, that would hire him the following year. Marzolini debuted with Boca on 3 April 1960 against Estudiantes de La Plata, defeating it by 2–1. Boca finished third at the end of the season, with Marzolini playing all of the games. In 1961 Marzolini scored his first goal in the top division, but Boca did not have a great campaign, finishing fifth. Marzolini played a total of 29 games scoring 2 goals. The first achievement came in 1962 when Boca won the title, with notable players such as goalkeeper Antonio Roma, Brazilian striker Paulo Valentim and Norberto Menéndez. Boca finished first with 42 points. Marzolini was also the most capped player of the season with 28 games played. Marzolini was named as left-back in the 1966 FIFA World Cup team of the tournament while Argentina was eliminated at the quarter final stage.

Marzolini suffered a stroke in 2019 and was later diagnosed with cancer. He died on 17 July 2020, at the age of 79. His grandson Facundo Lescano, son of his daughter Maria Marta, is a footballer, currently playing in Italy for U.S. Salernitana 1919.

In a 2007 interview with FourFourTwo magazine, English great Bobby Charlton named him in his dream eleven, describing him as a player who "wasn’t that fast, but his positioning was so good he didn’t need to be", and that he had "such good control that it gave him time and space to play the ball away safely".